The "9,00 konepistooli M/31“, most often only tenderly called "Suomi", is one of the best known Finnish weapons of the Second World War. Till today it stands for perfect quality and highest precision. And it taught the Russian invaders the meaning of fear.

This book will give an insight into the history of this extraordinary weapon, from its development via the manufacturing through to its use in Winter War (1939 – 1940), Continuation War (1941 – 1944) and finally in Lapland War (1944 – 1945). It also describes the lesser known variations like the bunker- and tank-Suomi, the magazines and the accessories.

The majority of the wartime photos used in this book were never published before.